Nitrate and nitrite
Farmington
Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.
82
Samples
0
Samples exceeding legal limit (MCL)
64
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.619 ppm | 13 | 13 | 0.0340 ppm - 1.43 ppm |
| 2015 | 0.734 ppm | 13 | 13 | 0.0360 ppm - 1.83 ppm |
| 2016 | 0.676 ppm | 14 | 14 | 0.0390 ppm - 1.77 ppm |
| 2017 | 0.622 ppm | 14 | 14 | 0.0360 ppm - 1.94 ppm |
| 2018 | 0.776 ppm | 14 | 14 | 0.0400 ppm - 2.39 ppm |
| 2019 | 0.766 ppm | 14 | 14 | 0.0420 ppm - 2.60 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.
EPA Maximum Contaminant
Level (MCL) 10 ppm
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-04-14 | AC21974 | 0.740 ppm |
| 2014-04-14 | AC21973 | 1.43 ppm |
| 2014-04-14 | AC21985 | 0.720 ppm |
| 2014-04-14 | AC21984 | 0.0630 ppm |
| 2014-04-14 | AC21983 | 0.850 ppm |
| 2014-04-14 | AC21982 | 1.11 ppm |
| 2014-04-14 | AC21981 | 0.490 ppm |
| 2014-04-14 | AC21980 | 0.970 ppm |
| 2014-04-14 | AC21979 | 0.0340 ppm |
| 2014-04-14 | AC21978 | 0.480 ppm |
| 2014-04-14 | AC21977 | 0.300 ppm |
| 2014-04-14 | AC21976 | 0.0340 ppm |
| 2014-04-14 | AC21975 | 0.830 ppm |
| 2015-07-21 | AC54688 | 1.03 ppm |
| 2015-07-21 | AC54692 | 0.800 ppm |
| 2015-07-21 | AC54684 | 0.0550 ppm |
| 2015-07-21 | AC54693 | 0.310 ppm |
| 2015-07-21 | AC54694 | 0.0510 ppm |
| 2015-07-21 | AC54690 | 1.83 ppm |
| 2015-07-21 | AC54695 | 0.0360 ppm |
| 2015-07-21 | AC54696 | 0.850 ppm |
| 2015-07-21 | AC54685 | 0.440 ppm |
| 2015-07-21 | AC54689 | 0.520 ppm |
| 2015-07-21 | AC54686 | 0.900 ppm |
| 2015-07-21 | AC54687 | 1.18 ppm |
| 2015-07-21 | AC54691 | 1.54 ppm |
| 2016-01-18 | AC65409 | 0.130 ppm |
| 2016-08-01 | AC80298 | 1.12 ppm |
| 2016-08-01 | AC80297 | 0.850 ppm |
| 2016-08-01 | AC80295 | 0.0670 ppm |
| 2016-08-01 | AC80290 | 1.01 ppm |
| 2016-08-01 | AC80291 | 0.300 ppm |
| 2016-08-01 | AC80296 | 0.810 ppm |
| 2016-08-01 | AC80299 | 1.77 ppm |
| 2016-08-01 | AC80300 | 0.780 ppm |
| 2016-08-01 | AC80294 | 0.0390 ppm |
| 2016-08-01 | AC80293 | 1.57 ppm |
| 2016-08-01 | AC80288 | 0.540 ppm |
| 2016-08-01 | AC80289 | 0.0710 ppm |
| 2016-08-01 | AC80292 | 0.410 ppm |
| 2017-08-02 | AD01886 | 1.94 ppm |
| 2017-08-02 | AD01894 | 0.400 ppm |
| 2017-08-02 | AD01895 | 0.290 ppm |
| 2017-08-02 | AD01887 | 0.870 ppm |
| 2017-08-02 | AD01891 | 0.860 ppm |
| 2017-08-02 | AD01889 | 0.0360 ppm |
| 2017-08-02 | AD01898 | 1.000 ppm |
| 2017-08-02 | AD01893 | 0.200 ppm |
| 2017-08-02 | AD01892 | 0.0680 ppm |
| 2017-08-02 | AD01890 | 1.13 ppm |
| 2017-08-02 | AD01896 | 0.0670 ppm |
| 2017-08-02 | AD01888 | 0.700 ppm |
| 2017-08-02 | AD01885 | 0.980 ppm |
| 2017-08-02 | AD01897 | 0.160 ppm |
| 2018-07-23 | AD29431 | 0.0760 ppm |
| 2018-07-23 | AD29435 | 1.08 ppm |
| 2018-07-23 | AD29436 | 0.720 ppm |
| 2018-07-23 | AD29437 | 2.39 ppm |
| 2018-07-23 | AD29438 | 1.73 ppm |
| 2018-07-24 | AD29441 | 0.0630 ppm |
| 2018-07-24 | AD29444 | 0.190 ppm |
| 2018-07-24 | AD29443 | 0.760 ppm |
| 2018-07-24 | AD29442 | 0.0400 ppm |
| 2018-07-24 | AD29439 | 0.900 ppm |
| 2018-07-24 | AD29434 | 1.24 ppm |
| 2018-07-24 | AD29433 | 0.950 ppm |
| 2018-07-24 | AD29432 | 0.440 ppm |
| 2018-07-24 | AD29440 | 0.290 ppm |
| 2019-07-19 | AD52328 | 1.16 ppm |
| 2019-07-19 | AD52327 | 0.470 ppm |
| 2019-07-19 | AD52326 | 0.0420 ppm |
| 2019-07-19 | AD52325 | 0.510 ppm |
| 2019-07-19 | AD52324 | 0.0820 ppm |
| 2019-07-19 | AD52323 | 1.57 ppm |
| 2019-07-19 | AD52322 | 0.900 ppm |
| 2019-07-19 | AD52321 | 0.910 ppm |
| 2019-07-19 | AD52320 | 0.270 ppm |
| 2019-07-19 | AD52319 | 2.60 ppm |
| 2019-07-19 | AD52318 | 0.210 ppm |
| 2019-07-19 | AD52317 | 0.200 ppm |
| 2019-07-19 | AD52316 | 0.770 ppm |
| 2019-07-19 | AD52315 | 1.03 ppm |